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How does Rails keep track of which migrations have run for a database?
...it takes the leading digits in the migration's file name and inserts a row for that "version", indicating it has been run. If you roll back that migration, Rails will delete the corresponding row from schema_migrations.
For example, running a migration file named 20120620193144_create_users.rb will...
Xcode : failed to get the task for process
This is for an existing app that compiled and distributed multiple times. Since updating to Xcode 5 I have this error popping.
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Chrome debugging - break on next click event
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What you are looking for are 'Event Listener Breakpoints' on the Sources tab. These breakpoints are triggered whenever any event listener, that listens for chosen event, is fired. You will find them in the Sources tab. In your case, expand 'Mouse...
How to insert a line break in a SQL Server VARCHAR/NVARCHAR string
... see any similar questions asked on this topic, and I had to research this for something I'm working on right now. Thought I would post the answer for it in case anyone else had the same question.
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Is there a git-merge --dry-run option?
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As noted previously, pass in the --no-commit flag, but to avoid a fast-forward commit, also pass in --no-ff, like so:
$ git merge --no-commit --no-ff $BRANCH
To examine the staged changes:
$ git diff --cached
And you can undo the merge, even if it is a fast-forward merge:
$ git merge --ab...
Include headers when using SELECT INTO OUTFILE?
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See a few answers below for ideas on using ORDER BY and also matt's answer for a way to quickly get all the ColName1, ColName2, etc. Very useful add-ons to this great answer!
– Andrew T
Oct 5 '15 at 1:11
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How to install Hibernate Tools in Eclipse?
...ware Updates... -> Add Site...):
The latest stable release update site for JBoss Tools
There you can find Hibernate tools together with other handy JBoss plugins.
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EditorFor() and html properties
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In MVC3, you can set width as follows:
@Html.TextBoxFor(c => c.PropertyName, new { style = "width: 500px;" })
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What is the different between 'Auto' and '*' when setting width/height for a grid column?
...distinguish the different between 'Auto' and '*' when setting width/height for a grid column. Please help!
1 Answer
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.NET - How can you split a “caps” delimited string into an array?
...component of a CamelCase name.
/([A-Z]+(?=$|[A-Z][a-z])|[A-Z]?[a-z]+)/g
For example:
"SimpleHTTPServer" => ["Simple", "HTTP", "Server"]
"camelCase" => ["camel", "Case"]
To convert that to just insert spaces between the words:
Regex.Replace(s, "([a-z](?=[A-Z])|[A-Z](?=[A-Z][a-z]))", "$1 ...